Wrap each icon in <symbol id="whatever"...> and use them with <svg> <use xlink:href="/your/icons.svg#whatever">....
The benefits are:
- Keeps things clean as we refer svg icons instead of including them raw in HTML.
- Scales with the font (set height and width to 1em).
- Free of accessibility issues that may arise from the use of custom fonts.
- Fast and efficient as we can put just the necessary icons in one file that will be served and cached in one request.
- Flexible because you can choose icons from a variety of existing sets.